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Effect of complex formation on nonlinear optical parameters of dye-graphene system

Paper ID Volume ID Publish Year Pages File Format Full-Text
26393 43950 2015 8 PDF Available
Title
Effect of complex formation on nonlinear optical parameters of dye-graphene system
Abstract

•A non-fluorescent charge transfer complex is formed between the dye and graphene.•Effect of saturable absorption in the dye-graphene system is drastically reduced.•Silver decoration of graphene reduces these effects.

The effect of saturable absorption in a dye decreases significantly in the presence of functionalized hydrogen-induced exfoliated wrinkled graphene (f-HEG). The absorption spectra give strong evidence of complex formation in the ground state. The fluorescence spectra and nonlinear optical properties of the dye are affected by f-HEG and silver decorated graphene (Ag-f-HEG) by various degrees. The open aperture Z-scan and degenerate four wave mixing (DFWM) techniques have been used to record the drastic changes in the nonlinear optical parameters of dye in presence of f-HEG and Ag-f-HEG. The results indicate a reduction in the average value of the nonlinearity due to formation of the non-fluorescent ground-state charge-transfer complex. At high input irradiance the optical limiting capability of the dye-f-HEG system has been found to be enhanced. The pre-existing charge transfer between silver nanoparticles and f-HEG reduces the strength of dye-f-HEG complex formation.

Keywords
Nonlinear absorption; Fluorescence quenching; Graphene; Laser dyes; Silver nanoparticles; Four wave mixing
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Effect of complex formation on nonlinear optical parameters of dye-graphene system
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 299, 15 February 2015, Pages 54–61
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us